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Oil displacement and corrosion inhibition two-effect agent which is prepared from grease and is used for oil fields, and preparation method thereof

A technology for oil displacement and corrosion inhibition, applied in the field of preparation and application of new surfactants, can solve the problems of poor corrosion inhibition, poor adsorption capacity, and difficult metal surface adsorption and film formation.

Inactive Publication Date: 2020-02-21
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional amine-containing surfactant has only one amine group, which has poor adsorption capacity, is not easy to adsorb and form a film on the metal surface, and has poor corrosion inhibition effect

Method used

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  • Oil displacement and corrosion inhibition two-effect agent which is prepared from grease and is used for oil fields, and preparation method thereof
  • Oil displacement and corrosion inhibition two-effect agent which is prepared from grease and is used for oil fields, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The first step, under normal temperature, polyethylene polyamine and natural oil are put in the reaction vessel according to the ratio of substances of 1:0.3, add polyethylene polyamine and natural oil 10 times the mass solvent, then add the amount of polyethylene polyamine substance 1 times the alkali, the polyethylene polyamine is selected from ethylenediamine of industrial grade purity, the natural oil is selected from soybean oil of industrial grade purity, the solvent is selected from methanol of industrial grade purity, and the alkali is selected from industrial grade grade purity sodium hydroxide;

[0018] In the second step, the mixture in the above reactor was stirred and heated at 40° C. for 6 hours;

[0019] In the third step, after the reaction is completed, cool to room temperature, then add an anionization reagent of 1 times the amount of the polyethylene polyamine substance, and then add a catalyst of 1% of the amount of the anionization reagent substance...

Embodiment 2

[0025] A method for preparing an oil-displacement and corrosion-inhibiting dual-effect agent for an oil field from oil, comprising the following steps:

[0026] The first step, under normal temperature, polyethylene polyamine and natural oil are placed in the reaction vessel according to the ratio of substances of 1:0.5, adding polyethylene polyamine and natural oil 20 times the mass solvent, and then adding the amount of polyethylene polyamine substance 2 twice the alkali, the polyethylene polyamine is chemically pure diethylenetriamine, the natural oil is selected from rapeseed oil of industrial grade purity, the solvent is chemically pure ethanol, and the alkali is chemically pure potassium hydroxide;

[0027] In the second step, the mixture in the above reactor was stirred and heated at 70° C. for 4 hours;

[0028] In the third step, after the reaction is completed, cool to room temperature, then add the anionization reagent of 2 times the amount of the polyethylene polyam...

Embodiment 3

[0034] A method for preparing an oil-displacement and corrosion-inhibiting dual-effect agent for an oil field from oil, comprising the following steps:

[0035] The first step, under normal temperature, polyethylene polyamine and natural oil are put in the reaction container according to the ratio of substances of 1:0.6, add polyethylene polyamine and natural oil 30 times the quality solvent, then add the amount of polyethylene polyamine substance 5 times the alkali, the polyethylene polyamine is selected from industrial grade triethylenetetramine, the natural oil is selected from industrial grade cottonseed oil, the solvent is selected from industrial grade n-propanol, and the alkali is selected from industrial grade grade sodium carbonate;

[0036] In the second step, the mixture in the above reactor was stirred and heated at 95°C for 3 hours;

[0037] In the third step, after the reaction is completed, cool to room temperature, then add an anionization reagent that is 3 ti...

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Abstract

The invention relates to an oil displacement and corrosion inhibition two-effect agent which is prepared from grease and is used for oil fields and a preparation method of the oil displacement and corrosion inhibition two-effect agent. The oil displacement and corrosion inhibition two-effect agent is prepared by a coefficient method comprising the following steps: adding a polyethylene polyamine,a natural grease and a solvent into a reaction container at normal temperature, adding an alkali, cooling to room temperature after heating reaction is finished, adding a polyanionic reagent and a catalyst, and heating to react; filtering, adding a lignin salt into an obtained filtrate, uniformly stirring, and evaporating the solvent to obtain the oil displacement and corrosion inhibition two-effect agent. The obtained oil displacement and corrosion inhibition two-effect agent has good static oil washing efficiency, and rock core displacement improved oil displacement efficiency and corrosioninhibition rate in oil field water.

Description

technical field [0001] The invention relates to the technical field of preparation and application of novel surfactants, in particular to a method for preparing an oil-displacement and corrosion-inhibiting dual-effect agent for oilfields from oil. Background technique [0002] Surfactant is one of the most important agents in the oilfield production process, and its dosage and variety are various. Therefore, it is necessary to combine upstream and downstream relationships and comprehensively consider technical requirements to prepare and use surfactants with multiple functions. [0003] my country's oilfields have successively entered the period of high water injection production, the water content of the produced fluid is high, and the increase in new proven reserves is slow, and the difficulty of exploration and recovery costs are increasing year by year. Therefore, controlling the water content of the produced fluid and enhancing the oil recovery can effectively improve t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/60C09K8/54C07C231/02C07C233/38C07C231/12C07C233/36C07C303/32C07C309/14E21B43/22
CPCC09K8/584C09K8/602C09K8/54C07C231/02C07C231/12C07C303/32E21B43/16C07C233/38C07C233/36C07C309/14
Inventor 蔡文斌董三宝任大忠李金灵陈刚
Owner XI'AN PETROLEUM UNIVERSITY